Pleased to see you have made a decsion - after all your car, money, time and love....err effort. I once owned HS30 00016 (RHD 00016 and it appears that Datsun/Nissan did run the same s/numbers in the beginning) and it was flared, sunroof, rusty etc result sold for a few $$ more than I paid for her. She has then shipped from NZ to Australia I believe it is still waiting the major rebuild by the owner I sold her to.
I believe if you rebuilding a Hybrid-Z, racecar or just restoring a Z you will want to start with the cleanest body you can get. So good on you for the excellent find and good luck with the build.
PS Has any one put an Audi 4.2l V8 into a Zed Not sure if it would fit